Or. ^ 



CONTRIBUTIONS FROM THE NEW YORK BOTANICAL 

 GARDEN -No. 153 



STUDIES ON THE ROCKY 

 MOUNTAIN ELORA-XXVII 



By per axel RYDBERG 



NEW YORK 

 1912 



Reprinted, without change of paging, from the Bulletin ofthe Torrey Botanical Club 



39: 301-328. 23 Jl l'.tl2 



